What went wrong with this film?

I very much enjoyed this film, It's probably my 2nd favorite of the franchise. The atmosphere and dino designs were good, especially the raptors having sexual dimorphism and being more bird-like as they're supposed to be. How did it became the weakest of the trilogy? I heard that it was mostly because of t-rex losing the fight which the audience didn't liked, but this doesn't seem to be the only reason to me.

I very much enjoyed this film, It's probably my 2nd favorite of the franchise. The atmosphere and dino designs were good, especially the raptors having sexual dimorphism and being more bird-like as they're supposed to be. How did it became the weakest of the trilogy? I heard that it was mostly because of t-rex losing the fight which the audience didn't liked, but this doesn't seem to be the only reason to me.